100999012 has 12 divisors (see below), whose sum is σ = 178400880. Its totient is φ = 50027336.

The previous prime is 100999007. The next prime is 100999013. The reversal of 100999012 is 210999001.

It is a super-2 number, since 2×100999012² = 20401600849952288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100999013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117562 + ... + 118417.

It is an arithmetic number, because the mean of its divisors is an integer number (14866740).

Almost surely, 2^100999012 is an apocalyptic number.

It is an amenable number.

100999012 is a deficient number, since it is larger than the sum of its proper divisors (77401868).

100999012 is a wasteful number, since it uses less digits than its factorization.

100999012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236090 (or 236088 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 100999012 is about 10049.8264661635. The cubic root of 100999012 is about 465.6994322522.

The spelling of 100999012 in words is "one hundred million, nine hundred ninety-nine thousand, twelve".